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General Bobcat Skidsteer Forum
Bobcat 600 Variable speed issues
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<blockquote data-quote="Unicam" data-source="post: 106973" data-attributes="member: 13790"><p>not sure the order i should unravel my thoughts so bare with me... there is a plug that if you put too thick of a washer under, and crank in too far will apply force to the sheave too quickly, so quickly in fact that it caused mine to start to leak. the sheave should not snap closed! you really just want a gentle application of hydro's to the sheave and it's up to the.... (i'm sorry i forgot all this stuffs real names) there is a spring and ball seat that control the holding force once applied, all this is in the variable speed valve body. it's possible there are some imperfections in the bore in the sheave where the o-rings ride for the actuating piston. check that very closely and I believe they honed that inner surface to make sure it's without flaws. not getting into the chain vs fixed belt debate, (mine is fixed position belt, retaining most stock parts. there is no slippage ever and no doubt it drives better than before malfunctioning). But one thing is for certain. you lose "neutral" so when you crank the engine over, your spinning everything and if the levers are not centered perfectly, mine want's to drive away or it bogs the starter down as basically the starter is driving the machine. also in the winter cranking is slow as it has the extra drag. one last thing and really not a big deal but i never let it warm up unattended now because it could start to drive.</p></blockquote><p></p>
[QUOTE="Unicam, post: 106973, member: 13790"] not sure the order i should unravel my thoughts so bare with me... there is a plug that if you put too thick of a washer under, and crank in too far will apply force to the sheave too quickly, so quickly in fact that it caused mine to start to leak. the sheave should not snap closed! you really just want a gentle application of hydro's to the sheave and it's up to the.... (i'm sorry i forgot all this stuffs real names) there is a spring and ball seat that control the holding force once applied, all this is in the variable speed valve body. it's possible there are some imperfections in the bore in the sheave where the o-rings ride for the actuating piston. check that very closely and I believe they honed that inner surface to make sure it's without flaws. not getting into the chain vs fixed belt debate, (mine is fixed position belt, retaining most stock parts. there is no slippage ever and no doubt it drives better than before malfunctioning). But one thing is for certain. you lose "neutral" so when you crank the engine over, your spinning everything and if the levers are not centered perfectly, mine want's to drive away or it bogs the starter down as basically the starter is driving the machine. also in the winter cranking is slow as it has the extra drag. one last thing and really not a big deal but i never let it warm up unattended now because it could start to drive. [/QUOTE]
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Bobcat 600 Variable speed issues
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